Bland-Altman plots of anaemia recovery time (AnRT) and multiples [4 (A), 5 (B), 6 (C) and 7 (D)] of half-time of deficit in haematocrit from baseline in children with persistent early-appearing anaemia. Biases were 2.23, −1.57, −5.37 and −9.17 for plots A, B, C and D; p = 0.29, 0.55, 0.09 and 0.02, respectively. The mean values ± 1.96 standard deviation (SD) of the differences are shown. dihfb, deficit in haematocrit from baseline.